Context
So I'm debating about buying a reflective umbrella to use and I was wondering if they are sturdy enough to survive being in a backpack. I know they have specialty cases, soft and hard, to hold them, light stands and other lightning gear but I don't hear about people carrying them in backpacks or bags that aren't specifically made to hold them.
I've been using lens pouches on lens and use normal backpacks to save money. When I'm not shooting I use the backpack as a backpack. I've done it with tripods and even light stands but not light modifiers such as umbrellas.
Question
Are umbrellas sturdy enough to survive in a backpack with light stands and lens in pouches? Can the same be said of other light modifiers?